Laser printing system

The invention describes a laser printing system (100) for illuminating an object moving relative to a laser module of the laser printing system (100) in a working plane (180) and a corresponding method of laser printing. The laser module comprises at least two laser arrays (110) of semiconductor las...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Moench, Holger, Heusler, Gero, Gronenborn, Stephan, Conrads, Ralf Gordon
Format:	Patent
Sprache:	eng
Schlagworte:	ADDITIVE MANUFACTURING TECHNOLOGY ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BASIC ELECTRIC ELEMENTS CASTING CINEMATOGRAPHY CLADDING OR PLATING BY SOLDERING OR WELDING CORRECTION OF TYPOGRAPHICAL ERRORS CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING DEVICES USING STIMULATED EMISSION ELECTRICITY ELECTROGRAPHY ELECTROPHOTOGRAPHY HOLOGRAPHY i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES MACHINE TOOLS MAGNETOGRAPHY MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PHOTOGRAPHY PHYSICS POWDER METALLURGY PRINTING SELECTIVE PRINTING MECHANISMS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SOLDERING OR UNSOLDERING STAMPS TRANSPORTING TYPEWRITERS WELDING WORKING BY LASER BEAM WORKING METALLIC POWDER WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	The invention describes a laser printing system (100) for illuminating an object moving relative to a laser module of the laser printing system (100) in a working plane (180) and a corresponding method of laser printing. The laser module comprises at least two laser arrays (110) of semiconductor lasers (115) and at least one optical element (170). The optical element (170) is adapted to image laser light emitted by the laser arrays (110), such that laser light of semiconductor lasers (115) of one laser array (110) is imaged to one pixel in a working plane (180) of the laser printing system (100) and an area element of the pixel is illuminated by means of at least two semiconductor lasers (115). The optical element does not project or focus laser light of each single semiconductor laser (115) to the working plane (180) but images the whole laser arrays to the working plane. The overlap of the laser light emitted by the semiconductor lasers (115) may improve the homogeneity of illumination or energy input and the reliability regarding malfunctions of single semiconductor lasers (115).